Hollow article



J. P. BURKE HOLLOW ARTICLE Aug. 29, 1933.

Filed March 6, 1931 INV ENTOR JAMES F. BURKE @5 his azwiar e y- PatentedAug. 29, 1933 James P. Burke, Wayne,'N. J., assignor to Mack Molding00., Wayne, N. J a'corporation of New Jersey Application March 6, 1931.Serial No. 520,665/ V 3 Claims. (01. 16121)" This invention relates tomolded articles and more particularly to molded articles such as knobsor like articles which are secured to the ends of levers or rods,particularly gear shift levers of automobiles, to furnish a readilygrasped handle therefor and it is an object of this invention to providean article of the class described of improved construction. It is alsoan object of this invention to provide a molded hollow article of theclass described in which a threaded metallic bushing is secured in thearticle for use in connecting the article to the lever or rod with whichit is used. It is also an object of this invention to retain themetallic bushing in position in such a way that it is securely held andit is not necessary to mold a part or parts of the article about thebushing. It is also an object of this invention to provide an improvedmethod of manufacturing the article described.

In the drawing Figure 1 is a view in elevation of a molded articleconstructed in accordance with this invention and shown applied to a rodor lever;

Figure 2 is substantially a vertical central section of the articleshown in Figure 1, the rod or lever being omitted;

Figure 3 is a plan view showing the inside of the top section of Figures1 and 2;

Figure 4 is a plan View showing the inside of the bottom section ofFigures 1 and 2; and

Figure 5 is a view similar to Figure 2 of a modified construction.

As shown in the drawing the molded hollow article is of the generalconstruction of the ar- 5 ticle shown in the application of Donald S.Kendall, Serial No. 350,843, filed March 29, 1929 and comprises a bottomsection 1 which is attached to the rod or lever 2 and a top section 4secured to the bottom section 1. The sections are molded of suitablecompositions and are formed with complemental beads or flanges 8 and 10which are engaged to secure the two parts together in the mannerdescribed in the Kendall application Serial No. 350,843.

In order to provide means for readily and securely attaching the articleor knob to a rod or lever, the bottom section has usually been threaded,but threads formed of the composition are considered undesirable. It hasalso been proposed to mold a metal bushing in the bottom section as thatis molded but in practice this is found to unduly complicate andincrease the expense of the molding process. To remedy the objections tothe prior constructions, the bottom section 1 is formed with an inwardlyprojecting boss 12 having an inwardly opening recess 14,shown" in thedrawing as of hexagonal shape, which extends substantially the fulldepth of the boss 12 and in the bottom 18 of the recess 14 is anoutwardly flaring opening 16 extending to the outside of the 9 bottomsection 1. Seated on the bottom 18 of the recess 14 is a hexagonal nut.20 which fits the recess 14 and has a thickness substantially equal tothe depth of the recess 14. While the recess 14 and nut 20 have beenshown of hexagonal shape, it will be understood they can have othershapes so long as the shapes are such as to keep the nut from turning inthe recess.

The top section 4 is formed with an inwardly extending projection 22 ofsuch size as to cause 0 it to engage with the nut 20 when the sections 1and 4 are assembled to form the complete knob or article.

In the modification shown in Figure 5 the bottom section 1 is formedwith a recess 14 to receive a metal filler 20 of similar shape which isof less thickness than the depth of the recess. Above the filler 20' therecess 14' is widened and can be of a different shape, as circular, toreceive a filling or packing washer 30 of yielding or cushioningmaterial which is placed between the filler 20' and the projection 22 onthe top section 4 and compensates for any irregularities in the heightsof the projection 22 and filler 20'.

In manufacturing the article, the sections 1 or 1 and 4 will be moldedin the manner set forth in the Kendall application Serial No. 350,- 843,the nut 20 or 20' placed in the recess 14 or 14' of the bottom section 1or 1' and the top section 4 snapped on the bottom section'as describedin the Kendall application Serial No. 350,843. In assembling the top andbottom sections 4 and 1 or 1' respectively the sections are placed sothat the projecting lug 24 on the bottom section 1 or 1' is placedbetween the lugs 26 on the top section 4 thus preventing relativerotation of the top and bottom sections.

When the article is assembled, the nut 20 or 20' is held againstrotation in the recess 14 or 14' by engagement with the walls of therecess, and

it is held in the recess by the projection 22 on the top section 4. Thenut 20 or 20 can be cold and the bottom section 1 or 1' can be warm whenthe nut 20 or 20 is placed in position so that the shrinkage of thebottom portion 1 or 1' in cooling will tend to cause the walls of therecess to seize the nut 20 or 20' and aid in securing the nut inposition. The method of attaching the top andbottom sections causes themA V to be securely held together and the interlockno ing lugs 24, 26permit of the knob or article being rotated by grasping the top section4 to attach the knob or article to the rod or lever 2.

What is claimed is:

1. A hollow article comprising a cup-shaped section having an inwardlyextending projection thereon, said section having'an openingtherethrough extending axially of said projection, said opening having ashoulder intermediate its length and being of polygonal shape for aportion of its length, a polygonal nut fitting said polygonal portionofsaid opening and engaging said shoulder, a second cup-shaped sectionsecured to "said first section at their meeting edges, a projection onsaid second section securing said nut in position and interlocking meanson said sections preventing relative rotation thereofs 2. A hollowarticle comprising a cup-shaped section having an inwardly extendingprojec tion, said section having an opening extending axially of saidprojection, said opening having a shoulder intermediate its length andbeing of angular shape for a portion of its length, an angular metallicfiller fitting said angular portion of said opening and engaging saidshoulder, a second cup-shaped section interlocking with said firstsection at their meeting edges and a pro- Jection on said secondsectionholding said filler in engagement with said shoulder.

3. A hollow article comprising a cup-shaped section having a thickenedportion, said section having an opening extending through said thickenedportion, said opening having a shoulder intermediate its length andbeing of angular shape tor a portion of its length, an angular metallicfiller fitting said angular portion of said opening and engaging saidshoulder, a second cupshaped section interlocked with said first sectionat their meeting'edges and a projection on said second section holdingsaid filler in engagement with said shoulder.

JAMES P; BURKE.

